and he notes - When all else fails, consult a dictionary. According to The American Heritage Office Edition Dictionary, [Dell Publishing, New York, NY ca. 1984]:
cement (see-ment) n. [Latin: caementium] - A construction adhesive consisting essentially of powdered rock and clay substances that form a paste with water and sets as a solid mass. concrete (kon-krete) n. [Latin: concretus] - A construction material consisting of conglomerate gravel, pebbles, broken stone or slag in a mortar or cement matrix. Concrete was first used in construction of Roman aqueducts and later in walls and porticos, often being reinforced with a wicker mesh, much as concrete slabs are today (with steel rod). While cement can be mixed with water and it will set, it has little strength and will crumble easily. Mixed with sand or aggregate and it becomes a strong construction material. I worked in a concrete pipe factory one summer during college and welded reinforcing cages (from 'wire cloth' as it was called). Cement was delivered to a silo by rail in covered hoppers and wire cloth in box cars. Outgoing pipe was usually delivered to a construction site by flatbed trailers and fresh pipe was yarded for curing by an old Reo tractor and a decrepit wood trailer. The process of making reinforced concrete sewer or water pipe is known as the 'Hume Process' and originated in Australia in the 19th century.. Much like the Roman method, the first pipes were reinforced with wicker cloth. When gas and then arc welding came into use, wire cloth was substituted. The gauge of the wire varied according to the load the pipe must withstand, as well as the diameter of the finished pipe. We made 12" to 72" pipe in both 4' and 8' lengths (mostly 8 footers though). A concrete mixing plant with the familiar delivery trucks with rotating vats wouldn't take as much room as a concrete product plant. Cement could be delivered by rail or truck. There would be bunkers for sand and different grades of aggregate for different concrete mixes (depending on the final use). The ground around the mixing plant would be covered with cement as well as concrete droppings. The apron where the delivery vats were loaded could be concrete slabs, but most are just well packed soil and cement, forming a very hard surface. Another summer employee and I had to dig a ditch through this stuff and it took a pick and a lot of sweat to just get through the surface. It was bull work and sure kept me in shape! There was a small concrete mixing plant here in town until last summer when it closed and the building and tower were removed. When the snow melts (it's supposed to be in the 40s this week) I'll get some photos of the site. The foundations are still there. Raleigh At 12:32 PM 12/27/2004, [EMAIL PROTECTED] wrote: > > On Monday, December 27, 2004, at 11:04 AM, Barry Comer wrote: > > > >> > >> enerally won't support the heavy loads of trucks and other equipment. > >> As for the differences, in my experience, Cement has a smooth, sandy > >> like texture, and is used for light load bearing surfaces, and/or > >> small > >> sections, for sidewalks, patios, air conditioner pads, etc. It > >> generally > >> isn't reinforced. Add gravel to cement, and you now have concrete. Change your membership, change your message settings, use our CALENDAR, view shared files or photos, view the list archives, GO TO http://groups.yahoo.com/group/S-Scale/ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/S-Scale/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
